Endoscope head end
By using a combined solution of single-core enameled wire, polyimide tube and metal foil in the endoscope, the welding instability and electrostatic breakdown problems caused by the thin and soft LED lamp bead power supply cable are solved, and higher welding stability, anti-static ability and electromagnetic compatibility are achieved.
Patent Information
- Application Number
- CN202420517670.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The LED lamp bead power supply cable in existing endoscopes is very thin and soft, which is not conducive to the positioning and welding of LED lamp beads, and cannot meet sufficient electrical gaps, and there may be a problem of electrostatic breakdown.
Single-core enameled wire is used instead of multi-strand stranded electronic wires. The conductor of single-core enameled wire can fully fill the internal space of the insulating layer and increase welding stability. At the same time, polyimide tubes are used to wrap single-core enameled wire to improve antistatic ability, and metal foil is used to replace epoxy vinyl to enhance the light-shading effect and electromagnetic shielding.
Through the use of single-core enameled wire, the welding positioning and stability of LED lamp beads are improved; the polyimide tube improves the antistatic ability of the lamp wire assembly; the use of metal foil not only improves the light-shading effect, but also enhances the electromagnetic compatibility performance of the endoscope.
Smart Images
Figure CN222584457U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to an endoscope head end. Background Art
[0002] Endoscopes, especially medical endoscopes, are mainly used for visual inspection of inaccessible body cavities. Generally, a light source and a visual receiving device are provided at the front end of the endoscope, wherein the light source is mostly LED lamp beads, and the visual receiver is a camera or image sensor, etc. Due to the limitation of the working environment, the size of the endoscope must be controlled within a very small range. In existing endoscopes, due to the small size of LED lamp beads, the cables welded to the tail end of the LED lamp beads are mainly multi-strand twisted electronic wires, which are very thin and soft, and it is difficult to accurately position the LED lamp during the assembly process of the endoscope; in addition, the LED lamp in the endoscope module is located outside the columnar head end. Due to the size limitation of the endoscope head end, the gap between the LED lamp beads, the tail end cable and the edge of the columnar head end is very small, and sufficient electrical clearance cannot be met. In the ESD (electrostatic discharge) test, static electricity may break through the LED lamp beads and their cables.
[0003] Therefore, the prior art needs to be improved. Utility Model Content
[0004] In view of this, the utility model provides an endoscope head end, which is used to solve the problem in the prior art that the power supply cable of the LED lamp beads on the endoscope is very thin and soft, which is not conducive to the positioning welding of the LED lamp beads.
[0005] In order to achieve one or part or all of the above purposes or other purposes, the utility model proposes an endoscope head, including a lamp bead and a lamp wire assembly, the lamp wire assembly includes a single-core enameled wire, the first end of the single-core enameled wire is connected to the lamp bead, and the second end of the single-core enameled wire is used to connect to a power source.
[0006] Preferably, each of the lamp wire assemblies comprises two single-core enameled wires, the first ends of the two single-core enameled wires are respectively connected to the positive and negative poles of the lamp bead, and the second ends of the two single-core enameled wires are respectively used to connect to the positive and negative poles of the power supply.
[0007] Preferably, the lamp beads are LED lamp beads.
[0008] Preferably, the lamp line assembly further comprises a polyimide tube, the polyimide tube is sleeved on the two single-core enameled wires, and the first end and the second end of the single-core enameled wire extend from two ends of the polyimide tube respectively.
[0009] Preferably, a welding reinforcement piece is provided at the connection between the single-core enameled wire and the lamp bead, and the welding reinforcement piece is used to increase the connection stability between the single-core enameled wire and the lamp bead.
[0010] Preferably, the endoscope lens end also includes a PCB transfer board, an image sensor, a lens cover and a module cable, the PCB transfer board is connected to one end of the module cable, the second end of the single-core enameled wire is connected to the PCB transfer board, the image sensor is connected and installed to the PCB transfer board, the lens cover covers the PCB transfer board and the lamp line assembly, and the lamp bead is located outside the lens cover.
[0011] Preferably, a wire sealant is provided at the connection between the PCB transfer board and the module cable, and the wire sealant is used to increase the connection stability between the PCB transfer board and the module cable.
[0012] Preferably, the image sensor is a CMOS image sensor.
[0013] Preferably, the lens cover comprises a main cover body and a columnar head end, the main cover body and the columnar head end are integrally formed, and the image sensor is located in the main cover body.
[0014] Preferably, the endoscope lens end further comprises a metal foil, and the metal foil is sleeved on the PCB transfer board and the periphery of the lens cover. Using metal foil instead of epoxy black glue has a good light-shielding effect and is also conducive to making the light-shielding layer thinner.
[0015] Preferably, the metal foil is connected to the shielding layer of the module cable or the grounding solder joint on the PCB transfer board. The metal foil maintains a low level state to form an electromagnetic shield, so that the endoscope has better performance in electromagnetic compatibility.
[0016] Preferably, the number of the lamp beads and the number of the lamp wire assemblies are both 2.
[0017] Implementing the embodiments of the present utility model will have the following beneficial effects:
[0018] 1. By using a single-core enameled wire to replace the multi-strand twisted electronic wire in the prior art, the internal conductor of the single-core enameled wire can fully fill the internal space of the insulation layer compared to the multi-strand twisted wire, and the conductor accounts for a large proportion of the cross-sectional area of the entire cable. During welding, the cable is easy to shape, which is conducive to welding the lamp beads to the two single-core enameled wires;
[0019] 2. In the preferred solution, a polyimide tube is used to wrap the two single-core enameled wires. Since the polyimide material has a very high dielectric strength, placing the single-core enameled wire in the polyimide tube can improve the overall antistatic ability of the lamp line assembly. In addition, the polyimide tube can be designed to be very thin and will not affect the bending and positioning of the lamp line assembly.
[0020] 3. In the preferred solution, metal foil is used to replace the epoxy black glue in the prior art. The metal with the same thickness has a better light shielding effect than the epoxy black glue. In addition, since some metals have high ductility, it is beneficial to make the thickness of the metal foil very small.
[0021] 4. In a more preferred embodiment, the metal foil is also connected to the shielding layer of the module cable or the grounding solder joint on the PCB transfer board, so that the metal foil maintains a low level state, forming an electromagnetic shielding, so that the endoscope has better performance in electromagnetic compatibility. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] in:
[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the endoscope head end of an embodiment of the utility model;
[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of an endoscope head end after removing the metal foil in one embodiment of the utility model;
[0026] Figure 3 This is a schematic diagram of a three-dimensional exploded structure of an endoscope head end according to an embodiment of the utility model;
[0027] Figure 4 This is a three-dimensional structural schematic diagram of a lamp line assembly in one embodiment of the utility model;
[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of a lamp line assembly in one embodiment of the utility model.
[0029] The reference numerals are as follows: 1. lamp bead; 11. lamp cord assembly; 111. single-core enameled wire; 1111. conductor; 1112. insulating layer; 112. polyimide tube; 12. welding reinforcement; 2. PCB transfer board; 3. image sensor; 4. lens cover; 41. main cover body; 42. columnar head end; 5. module cable; 51. welding wire sealant; 6. metal foil. DETAILED DESCRIPTION
[0030] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0032] It is understood that the singular forms "a", "an" and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.
[0033] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to another element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only. In the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle" and the like is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing the present utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, the above-mentioned part of the terms may be used to express other meanings in addition to being used to express orientation or positional relationship, for example, the term "upper" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to the specific circumstances.
[0034] In addition, the terms "disposed", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0035] Reference Figures 1 to 5 An embodiment of the utility model provides an endoscope head end, comprising one or more lamp beads 1 and lamp wire assemblies 11 corresponding to the lamp beads 1 one by one, the lamp wire assembly 11 comprising a single-core enameled wire 111, the first end of the single-core enameled wire 111 is connected to the lamp bead 1, and the second end of the single-core enameled wire 111 is used to connect to a power source. The number of lamp beads 1 and lamp wire assemblies 11 is not limited, and can be one or more.
[0036] In some optional embodiments, such as Figure 3 As shown, the number of the lamp beads 1 and the number of the lamp line components 11 are both two.
[0037] In some optional embodiments, each lamp wire assembly 11 includes two single-core enameled wires 111, the first ends of the two single-core enameled wires 111 are connected to the positive and negative poles of the lamp bead 1, and the second ends of the two single-core enameled wires 111 are respectively used to connect to the positive and negative poles of the power supply.
[0038] In some optional embodiments, the lamp bead 1 is an LED lamp bead.
[0039] In some optional embodiments, such as Figures 3 to 5 As shown, the lamp line assembly 11 further includes a polyimide tube 112, which is sleeved on two single-core enameled wires 111, and the first end and the second end of the single-core enameled wire 111 extend from both ends of the polyimide tube 112. Since the polyimide material has a very high dielectric strength, placing the single-core enameled wire 111 in the polyimide tube 112 can improve the overall antistatic ability of the lamp line assembly 11, and the wall thickness of the polyimide tube 112 can be made very thin, and the wall thickness can reach 0.05 mm. The very thin polyimide tube 112 has very little effect on the bending of the lamp line assembly 11.
[0040] In some optional embodiments, such as Figures 1 to 3 As shown, a welding reinforcement piece 12 is provided at the connection between the single-core enameled wire 111 and the lamp bead 1 , and the welding reinforcement piece 12 is used to increase the connection stability between the single-core enameled wire 111 and the lamp bead 1 .
[0041] In some optional embodiments, such as Figures 1 to 3 As shown, the endoscope lens end also includes a PCB transfer board 2, an image sensor 3, a lens cover 4 and a module cable 5, the PCB transfer board 2 is connected to one end of the module cable 5, the second end of the single-core enameled wire 111 is connected to the PCB transfer board 2, the image sensor 3 is connected and installed to the PCB transfer board 2, the lens cover 4 covers the PCB transfer board 2 and the lamp line assembly 11, and the lamp bead 1 is located outside the lens cover.
[0042] In some optional embodiments, such as Figure 5As shown, the single-core enameled wire 111 includes a middle conductor 1111 and an insulating layer 1112 wrapping the conductor 1111. The diameter of the single-core enameled wire 111 is 0.15mm-0.2mm, and the thickness of the insulating layer 1112 is greater than or equal to 0.0275mm. Optimally, the thickness of the insulating layer 1112 is equal to 0.0275mm.
[0043] In some optional embodiments, such as Figures 1 to 3 As shown, a wire sealant 51 is provided at the connection between the PCB transfer board 2 and the module cable 5 , and the wire sealant 51 is used to increase the connection stability between the PCB transfer board 2 and the module cable 5 .
[0044] In some optional embodiments, the image sensor 3 is a CMOS image sensor.
[0045] In some optional embodiments, such as Figures 1 to 3 As shown, the lens cover 4 includes a main cover body 41 and a columnar head end 42 . The main cover body 41 and the columnar head end 42 are integrally formed, and the image sensor 3 is located in the main cover body 41 .
[0046] In some optional embodiments, such as Figure 2 and Figure 3 As shown, the endoscope head end also includes a metal foil 6, which is sleeved on the PCB transfer board 2 and the outer periphery of the lens cover 4. The metal foil 6 is used to replace the epoxy black glue in the prior art. Under the same thickness, the metal has a better light-shielding effect than the epoxy black glue. In addition, because some metals have high ductility, it is beneficial to make the thickness of the metal foil 6 very small.
[0047] In some optional embodiments, the metal foil 6 is connected to the shielding layer of the module cable 5 or the grounding solder joint on the PCB transfer board 2. In this way, the metal foil 6 always maintains a low level state, forming an electromagnetic shielding layer, reducing the risk of the internal image sensor 3 being interfered by external electromagnetic interference, and improving the anti-interference ability of the endoscope.
[0048] The endoscope head end provided by the embodiment of the utility model has the following beneficial effects:
[0049] 1. By using a single-core enameled wire 111 to replace the multi-strand twisted electronic wire in the prior art, the internal conductor 1111 of the single-core enameled wire 111 can fully fill the internal space of the insulating layer 1112 compared to the multi-strand twisted wire, and the conductor 1111 accounts for a large proportion of the cross-sectional area of the entire cable. During welding, the cable is easy to shape, which is conducive to welding the lamp bead 1 to the two single-core enameled wires 111;
[0050] 2. In some preferred embodiments, a polyimide tube 112 is used to wrap the two single-core enameled wires 111. Since the polyimide material has a very high dielectric strength, the single-core enameled wires 111 are placed in the polyimide tube 112, which can improve the overall antistatic ability of the lamp line assembly 11. In addition, the polyimide tube 112 can be designed to be very thin, which will not affect the bending and positioning of the lamp line assembly 11.
[0051] 3. In some preferred embodiments, the metal foil 6 is used to replace the epoxy black glue in the prior art, and the metal with the same thickness has a better light shielding effect than the epoxy black glue. In addition, since some metals have high ductility, it is beneficial to make the thickness of the metal foil 6 very small;
[0052] 4. In a further preferred embodiment, the metal foil 6 is also connected to the shielding layer of the module cable 5 or the grounding solder joint on the PCB transfer board 2, so that the metal foil 6 maintains a low level state to form an electromagnetic shielding, so that the endoscope has better performance in electromagnetic compatibility.
[0053] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.
Claims
1. An endoscope head end, characterized in that: The invention comprises a lamp bead (1) and a lamp wire assembly (11), wherein the lamp wire assembly (11) comprises a single-core enameled wire (111), a first end of the single-core enameled wire (111) is connected to the lamp bead (1), and a second end of the single-core enameled wire (111) is used for connecting to a power source.
2. The endoscope head end according to claim 1, characterized in that: Each of the lamp wire assemblies (11) comprises two single-core enameled wires (111).
3. The endoscope head end according to claim 2, characterized in that: The lamp line assembly (11) further comprises a polyimide tube (112), wherein the polyimide tube (112) is sleeved outside the two single-core enameled wires (111), and the first end and the second end of the single-core enameled wires (111) respectively extend out from two ends of the polyimide tube (112).
4. The endoscope head end according to claim 1, characterized in that: A welding reinforcement piece (12) is provided at the connection between the single-core enameled wire (111) and the lamp bead (1), and the welding reinforcement piece (12) is used to increase the connection stability between the single-core enameled wire (111) and the lamp bead (1).
5. The endoscope head end according to any one of claims 1 to 4, characterized in that: The endoscope lens end further comprises a PCB transfer board (2), an image sensor (3), a lens cover (4) and a module cable (5); the PCB transfer board (2) is connected to one end of the module cable (5); the second end of the single-core enameled wire (111) is connected to the PCB transfer board (2); the image sensor (3) is connected and installed to the PCB transfer board (2); the lens cover (4) covers the PCB transfer board (2) and the lamp line assembly (11); and the lamp bead (1) is located outside the lens cover.
6. The endoscope head end according to claim 5, characterized in that: A wire sealant (51) is provided at the connection between the PCB transfer board (2) and the module cable (5), and the wire sealant (51) is used to increase the connection stability between the PCB transfer board (2) and the module cable (5).
7. The endoscope head end according to claim 5, characterized in that: The lens cover (4) comprises a main cover body (41) and a columnar head end (42); the main cover body (41) and the columnar head end (42) are integrally formed; and the image sensor (3) is located inside the main cover body (41).
8. The endoscope head end according to claim 5, characterized in that: The endoscope lens end also includes a metal foil (6), and the metal foil (6) is sleeved on the outer periphery of the PCB transfer board (2) and the lens cover (4).
9. The endoscope head end according to claim 8, characterized in that: The metal foil (6) is connected to the shielding layer of the module cable (5) or the grounding solder joint on the PCB transfer board (2).
10. The endoscope head end according to claim 1, characterized in that: The number of the lamp beads (1) and the number of the lamp line components (11) are both two.